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Date:   Fri, 5 Aug 2022 11:51:08 -0700
From:   Jakub Kicinski <>
To:     "Keller, Jacob E" <>
Cc:     Jiri Pirko <>,
        "" <>
Subject: Re: [net-next PATCH 1/2] devlink: add dry run attribute to flash

On Fri, 5 Aug 2022 16:32:30 +0000 Keller, Jacob E wrote:
> > Hm, yes. Don't invest too much effort into rendering per-cmd policies
> > right now, tho. I've started working on putting the parsing policies
> > in YAML last Friday. This way we can auto-gen the policy for the kernel
> > and user space can auto-gen the parser/nl TLV writer. Long story short
> > we can kill two birds with one stone if you hold off until I have the
> > format ironed out. For now maybe just fork the policies into two -
> > with and without dry run attr. We'll improve the granularity later
> > when doing the YAML conversion.  
> Any update on this?
> FWIW I started looking at iproute2 code to dump policy and check
> whether a specific attribute is accepted by the kernel.

Yes and no, I coded a little bit of it up, coincidentally I have a YAML
policy for genetlink policy querying if that's helpful:

I'll try to wrap up the YAML format by today / tomorrow and send an
early RFC, but the codegen part (and everything else really) still
requires much work. Probably another month until I can post the first
non-RFC with error checking, kernel policy generation, uAPI generation

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